Abstract

With a traditional roller gear, only the rollers in the centre are working correctly. The rollers on both sides are more or less gliding on the sea bottom because their axis are not in a position perpendicular to the towing direction. Sediment is stirred up by these gliding rollers coupled with a negative bottom impact of this gear. With a modified roller gear for shrimp beam trawls the axis of all rollers are orientated 90° to the towing direction enabling all rollers to roll correctly on the sea bottom.